121102202221 has 32 divisors (see below), whose sum is σ = 164826240768. Its totient is φ = 85913187840.

The previous prime is 121102202219. The next prime is 121102202231. The reversal of 121102202221 is 122202201121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 121102202221 - 2¹ = 121102202219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121102202195 and 121102202204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121102202231) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 755566 + ... + 901711.

It is an arithmetic number, because the mean of its divisors is an integer number (5150820024).

Almost surely, 2^121102202221 is an apocalyptic number.

121102202221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121102202221 is a deficient number, since it is larger than the sum of its proper divisors (43724038547).

121102202221 is a wasteful number, since it uses less digits than its factorization.

121102202221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1657381.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 121102202221 its reverse (122202201121), we get a palindrome (243304403342).

It can be divided in two parts, 121102 and 202221, that added together give a palindrome (323323).

The spelling of 121102202221 in words is "one hundred twenty-one billion, one hundred two million, two hundred two thousand, two hundred twenty-one".